|A couple of people spoke to me about ESP things yesterday, which caused me to formulate my view of such things into a very succinct form. I believe in many of the effects attributed to ESP, but I don't believe they are ES. I fiddled around a bit last night attempting to demonstrate my contentions, and came up with a rather excellent example which nicely demonstrates that it is possible to detect a person behind you, using only vision. In a room with only one light, hold up your hand so that the palm faces directly away from the light. Now put something either black or white a foot or two away from your hand, in the unlit palm-side direction. Watch the effect on the light-level on your palm. I was expecting something bordering on imperceptible, something you could pick up only subconsciously, but the effect was remarkably easy to observe. Add to that the other available subtle cues of scent, sound, air disturbances, and body language and you can explain almost the entire repertoire of functional 'ESP'.